Course Title:
Agricultural Mechanics and Metal Technology
Lesson Title:
Creating Western Jewelry from Horseshoe and/or Concrete Nails
TEKS Addressed in Lesson: 130.22 (c)(9)(E)
http://ritter.tea.state.tx.us/rules/tac/chapter130/ch130a.html
Lesson Objective:
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3
4
After completing this lesson the student will be able to:
safely light an oxyfuel torch;
adjust an oxyfuel torch to a brazing flame;
adjust an oxyfuel torch to an oxidizing flame; and
braze the 8 nails in the shape of a cross or crucifix.
Tools and Equipment
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8 horseshoe / concrete nails, 3’ long and 1’ long
Oxyfuel welding rig
#3 welding tip, bronze flux, welding rods, fluxed rods
Appropriate PPE - #10 goggles and safety glasses, welding gloves, pliers for handling hot metal
Firebrick welding table
Tip cleaner
Water for cooling
Drill press & bits
Buffing wheel
Portable drill
Key Terms / Vocabulary
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Plastic state
Oxidizing flame
Soldering
Flux-coated rod
Ratio
Oxygen
Acetylene
Welding tip
Brazing
One-to-one ratio
Interest Approach/Anticipatory Set
Students will learn the importance of alternative methods of joining two or more pieces of
metal together, using methods other than SMAW or MIG welding. The students will be challenged to
braze or bronze-weld common horse shoe nails/concrete nails into the shape of a cross or other folk art
piece. The students will be encouraged to safely braze and create a piece of “jewelry” for their mom for
Mother’s Day.
Teaching Plan and Strategy / Presentation of New Material
1 Explain the brazing process and distribute 8 nails
2 Demonstrate brazing and explain the “plastic” bonding process involved in brazing or bronzewelding. 3 Distribute optional 1” or 3” horseshoe nails to use in the laboratory process
4. Emphasis is on developing SAFE brazing methods and patience and care in thorough brazewelding
Activity/Application/ Student Engagement /Laboratory
Each student will partner with a student-peer as selected by instructor. Students will lay out nails to be
brazed and SAFELY assist each other in the brazing of materials. Students will be encouraged to design
their “jewelry” as they like and make sure the bronze-welding or brazing layers are uniform. Students
will drill a hole 1/16” or larger in diameter for project use - jewelry chain, pin attachment
Evaluation / Summary
Scoring Rubric:
Uniformity and Braze/Bronze appearance / eye appeal
Originality
Demonstrating a Safe Process to complete the Project
Maximum possible points
25 points
50 points
25 points
100
References/Additional Materials / Extended Learning Opportunities/ Enrichment
Praxair Welding Company Posters and Power Points, IMS Online resources
College & Career Readiness Standard
Cross Disciplinary – Cognitive 1A1
Mathematics - IV A,1
Lesson developed by Steve Forsythe, AST / CTE Administrator, Lampasas HS
©Texas Education Agency, 2015